Bogie for railway rolling stock



July 18, 1950 Filed June 30. 1948 .J. WALDVOGEL ETAL BOGIE FOR RAILWAY ROLLING STOCK 2 Sheets-Sheet 1 July 18, 1950 J. WALDVOGEL ETAL BOGIE FOR RAILWAY ROLLING s'rocx Filed June so. 1948 2 Sheets-Sheet 2 FIG. 3

latentecl July 18, 1950- t;

, 1 UNITED "STATES PATENT OFFICE 1 L:.-. 2,5 1 5,s1'2 Q noon; FOR RAI WAYROLLING STOCK Jakob Waldvogel and Gasto'iiBorgeaud, Winter- I thur, Switzerland, assignors to Schweizerische 7 Switzerland LokomotivundMaschinenfabrik, Winterthur,

Application June so, 1948,seria.1N0. 36,073

1 In Switzerland July 4, 1947 Our present invention relates to a bogie defined in our copending application Ser. No. 764,328, now Patent No. 2,519,443, dated June 6, 1950. When, insuch bogiesjthe weight of the vehicle-bodywhich is carried by the longitudinally disposed leaf-springs which are suspended laterally oscillatab1eis very great, the accommodation of the said springs in the space between the wheels of the intermediate wheel-set and the minimum fixed structure presents certain difficulties. In order to obviate the latter, the present invention provides for a subdivision of each longitudinal spring-pack in two individual spring packs, one of the latter being disposed outside, and the other inside of each wheel of the intermediate wheel set, and each compensatorbeam or bolster is secured to the spring-ends lying in the same transverse plane, by means of an equalizer lever.

Various embodiments of our present invention are schematically shown, by way of example, in the accompanying drawing, in which Fig. 1 shows the bogie in two cross-sections, in the left-hand portion on the line a--a, and in the right-hand portion on the line b-b in Fig. 2,

Fig. 1a is a vertical section on the line C'-C of Fig. 1.

Fig. 1b is a sectional view of a type of connection J as used at various points to permit motion in a vertical direction and swinging motion of the bolster.

Fig. 2 is a plan view of Fig. 1.

Fig. 3 is a view similar to the left-hand portion of Fig. 1, of a modification.

Fig. 3a is a partial side view of Fig. 3.

Fig. 4 a top plan view of such modification, and

Fig. 5 a plan view of a modified king-pin supporting arrangement.

The truck-frame I is resiliently supported on the axle boxes 2 of the three truck-axles, which boxes are adapted vertically movable relative to frame I. In Fig. 1, only the intermediate axle 3 of the three truck-axles is shown, which axle serves as free or running axle, and in Fig. 2 only the two wheels I3 of the latter are shown. The sidewalls 4 of the truck are interconnected by means of the transoms 5 both fore and aft of the intermediate axle 3. The transoms 5 are adapted as box-girders. A compensator beam or bolster B is suspended laterally oscillatable from the truck-frame on the pins 8 through the swing links I, both fore and aft of the bogie-centre. The compensators or bolsters 6 consist of two flat beams each, which are set on edge and rigidly interconnected with eachother. The ends III of 2 I the bolsters are connected through theequalizers II--which are pivoted thereto on pins 9-and by means of the pins I4 to the ends I2 of the 1011-- gitudinal spring pack I5, I6 which are disposed in parallel relation both inside and outside of the wheels I3 of the intermediate axle 3.

The vehicle body I8 is supported, through shoes 2| secured thereto, on the spring pack bands I9 and 20 of the longitudinal spring pack I5 and I6, by means of lenticular intermediate plates 22, the spherical-surfaces of the latter affording a good adjustability of the plane sliding-face 30. The bands I9, 20 of the spring pack I5, I6 are pivoted to the truck-frame I through links 24 so that they are capable of executing only lateral and vertical. movements relative to the truck. The king-pin 25, which is fixed to the body I8, engages a cross-rod 26, the ends of the latter being pivoted to the rods 21 which in turn are pivoted on pins 28 to the truck. The rods 2'! transmit the longitudinal forces from the body I8 onto the truck-frame I and vice-versa. Two further arms 33 are secured to the hub of the cross-rod 26, extending in the longitudinal direction of the vehicle, and the ends of said arms are articulated to the links 34 which in turn are pivoted to the bolsters 6 on pins 35. The two levers 26, 33 form a single wheel structure mounted in a universally tiltable relationship on a ball-shaped bush (Figs. 1 and 3) which is secured by a nut to the king pin 25. Such linkage serves for the purpose of engaging the two bolsters 6, when the vehicle-body I8 moves laterally with respect to the truck-frame I, the bolsters 6, hanging on the swing links I through the pins 9, being permitted to oscillate laterally with respect to the truck-frame I. The entire arrangement permits the truck-frame to move laterally and vertically and also to rock about a vertical axis relative to the body I8. During such latter rocking movement, the body I8 slides on th plane face 30 of the shoes 2|.

It is to be understood that the type of connection J shown in Fig. 11) for the levers 26 and 21 also is representative for the connections at the points indicated; the whole for the purpose of permitting motion in a vertical direction and a swinging motion of the bolster 6.

The rigging 3335 may be omitted, provided that the shoes 2| are positively guided. Such a modification is shown in Figs. 3, 3a and 4 in which the intermediate plates 22 are each provided with a guide-groove 36 for engaging the shoes 2 I, such grooves being represented in plan by circular arcs, similar to those in our said copending applicaq 3 tion. The said grooves have their common centre coinciding with the centre of the king pin 25.

In place of the rigging 26-28 engaging the king pin, a transverse slot 38 of a common type may be provided in a longitudinal bearer 31 of the truck frame 1 for the king-pin which is provided with a slide block 39, as shown in Fig. 5.

In place of a single pin 9 for pivoting the lower end of swing link I and equalizer II to the bolster 6, a separate pin each may be provided for pivoting the said link and the said equalizer.

What we claim and desire to :secure by-Letters Patent is:

1. In a bogie for railway rolling stock; having three wheel-and-axle sets, a spring arrangement for suspending the vehicle body from the truck frame, comprising a spring pack on either side of each wheel of the intermediate wheel-andaxle set in a longitudinal parallel arrangement, bands secured about said spring pack, means providing a limited slidab'le andswivelable support for said vehicle body on said spring packs, link means for securing the" band of each spring pack to the truck frame with lateral and vertical mov- 4 & ability, a pair of rigidly interconnected bolsters both fore and aft of the said set, a two-arm equalizer lever fulcrumed at a midpoint to each end of the two pairs of bolsters and extending in the direction thereof, each end of said lever beingpivoted to the corresponding end of the appurtenant-spring pack in order to permit the spring pack end and the end of the said lever to rock on each other at right angles, and means for oscillatably suspending the vehicle body and "spring arrangement from the truck frame.

2. In a rail-vehicle bogie set out in claim 1,

*said means for oscillatably suspending the vehicle body and spring arrangement from the truck frame comprising a pin at each end of each pair of bolsters rigidly interconnecting the two bolsters of each pair of bolsters and serving as a fulcrum for the said equalizer lever, and swing links each pivoted at one end on the said pin and swiveled at the other end to the truck frame.

JAKOB WALDVOGEL. GASTON BORGEAUD.

No references cited. 

